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Makes 🢒 Buick 🢒 2005 🢒 Terraza - 4WD 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Power Outlet Receptacle Inoperative

Power Outlet Receptacle Inoperative 120 AC Volts

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

B+

1

1

--

--

IGN I, IGN II

1

1

--

--

Signal

1

1

2

--

Phase A

1

1

1

--

Neutral

1

1

1

--

Ground

--

1

1

--

1. Accessory AD/DC power control module OFF

2. Accessory AD/DC power control module ON

Circuit/System Description

The accessory AC/DC power control module converts the 12 V DC battery voltage to 108-125 V AC to operate AC-powered devices. The accessory AC/DC power control module provides up to 150 W of power. The 115 V AC auxiliary power outlet is located on the right rear interior trim panel. The AC/DC power control module is located behind the right rear trim panel.

Battery voltage is supplied to the accessory AC/DC power control module from the 25 A AC/DC INVRTR fuse located in the underhood fuse block. The accessory AC/DC power control module is grounded to the right D-pillar. When the ignition is turned ON or to accessory, ignition voltage is supplied to the plug-inserted switches in the accessory power outlet. When a 115 V AC powered device is plugged into the outlet, the normally-open plug-inserted switches, located internally in the accessory power outlet, close. The accessory AC/DC power control module detects voltage on the signal circuit and the accessory AC/DC power control module supplies 115 V AC to the accessory power outlet after a 1.5 second delay. The LED on the outlet illuminates to indicate that the outlet is powered.

Diagnostic Aids
    • A household wall-outlet tester should not be used to diagnose this system. The tester will indicate an open ground, which is a normal condition.
    • The ignition voltage circuit is a low-current output, and may not illuminate a test lamp.

Reference Information

Schematic Reference

Cigar Lighter/Power Outlet Schematics

Connector End View Reference

Power Outlet Connector End Views

Description and Operation

Power Outlets Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Circuit/System Verification

Ignition ON, verify that a 115 V AC powered device functions when plugged into the auxiliary power outlet.

Circuit/System Testing
  1. Ignition OFF, disconnect the harness connector at the auxiliary power outlet.
  2. Ignition ON, test for greater than 2.5 V between the ignition voltage circuit terminal 4 and ground.
    3. ⇒If less than the specified range, test the ignition voltage circuit for a short to ground or an open/high resistance.
  3. Ignition OFF, disconnect the harness connectors at the accessory AD/DC power control module.
  4. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 Ω between the ground circuit terminal 1 C2 and ground.
    5. ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
  5. Verify that a test lamp illuminates between the B+ circuit terminal 2 C2 and ground.
    6. ⇒If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  6. Ignition OFF, connect the harness connector to the auxiliary power outlet.
  7. Test for less than 2 Ω between the following terminals:
    8. • The phase A circuit terminal 6 C1 at the module harness, and the hot terminal at the auxiliary power outlet
    • The neutral circuit terminal 4 C1 at the module harness, and the neutral terminal at the auxiliary power outlet
    ⇒If greater than the specified range, test the appropriate circuit for an open/high resistance. If the circuit tests normal, test or replace the auxiliary power outlet.
  8. Test for infinite resistance between the following terminals at the module harness and ground:
    9. • The phase A circuit terminal 6 C1
    • The neutral circuit terminal 4 C1
    ⇒If less than the specified value, test the appropriate circuit for a short to ground. If the circuit tests normal, test or replace the auxiliary power outlet.
  9. Test for greater than 1 MΩ between the phase A circuit terminal 6 C1 and the neutral circuit terminal 4 C1.
    10. ⇒If less than the specified value, test the phase A circuit and the neutral circuit for a shorted together condition. If the circuits test normal, test or replace the auxiliary power outlet.
  10. Connect an AC-powered device to the auxiliary power outlet.
  11. Ignition ON, test for greater than 2.5 V between the signal circuit terminal 2 C1 and ground.
    12. ⇒If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the auxiliary power outlet.
  12. If all circuits test normal, replace the accessory AD/DC power control module.

Component Testing

Auxiliary Power Outlet Test

  1. Ignition OFF, remove the auxiliary power outlet.
  2. Test for greater than 1 MΩ between the phase A circuit terminal 6 and the neutral circuit terminal 3.
    3. ⇒If less than the specified range, replace the auxiliary power outlet.
  3. Test for less than 1 Ω between the following terminals:
    4. • The phase A circuit terminal 6, and the hot terminal
    • The neutral circuit terminal 3, and the neutral terminal
    ⇒If greater than the specified range, replace the auxiliary power outlet.
  4. Test for infinite resistance between the ignition voltage circuit terminal 4 and the signal circuit terminal 1.
    5. ⇒If not the specified value, replace the auxiliary power outlet.
  5. Connect an AC-powered device to the auxiliary power outlet.
  6. Test for less than 1 Ω between the ignition voltage circuit terminal 4 and the signal circuit terminal 1.
    7. ⇒If greater than the specified range, replace the auxiliary power outlet.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  120-Volt Accessory Power Receptacle Replacement
    •  Control Module References for the accessory AC/DC power control module replacement, setup, and programming.